Related Experiment Videos
Effect of long-term angiotensin-converting enzyme inhibition on vascular function in patients with chronic congestive
1Medizinische Klinik III, University of Freiburg, Germany.
Insights
Peripheral vasodilatory capacity is reduced in heart failure patients not taking aspirin. Angiotensin-converting enzyme inhibition can restore this capacity, suggesting a role for cyclooxygenase-dependent factors in vasoconstriction.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Peripheral vasodilatory capacity is often impaired in patients with chronic congestive heart failure.
- Aspirin's effect on this impairment is not fully understood.
Purpose of the Study:
- To investigate the role of aspirin and angiotensin-converting enzyme (ACE) inhibition on peripheral vasodilatory capacity in chronic congestive heart failure (CHF).
- To determine if cyclooxygenase-dependent factors contribute to vasoconstriction in CHF.
Main Methods:
- Comparing peripheral vasodilatory capacity in CHF patients treated with and without aspirin.
- Assessing the effect of chronic ACE inhibition on peripheral vasodilatory capacity in CHF patients.
Main Results:
- Peripheral vasodilatory capacity was impaired in CHF patients not taking aspirin but preserved in those taking aspirin.
- Chronic ACE inhibition restored the decreased peripheral vasodilatory capacity in CHF patients.
- Findings suggest locally acting cyclooxygenase-dependent factors contribute to peripheral vasoconstriction in CHF.
Conclusions:
- Aspirin appears to preserve peripheral vasodilatory capacity in patients with chronic congestive heart failure.
- Cyclooxygenase-dependent mechanisms play a role in the peripheral vasoconstriction observed in chronic congestive heart failure.
- ACE inhibition can overcome the impaired vasodilation in these patients.
Abstract:
The present study demonstrates that peripheral vasodilatory capacity is impaired in patients with chronic congestive heart failure not treated with aspirin, but preserved in patients taking aspirin. This decreased peripheral vasodilatory capacity can be restored by chronic angiotensin-converting enzyme inhibition, indicating that locally acting cyclooxygenase-dependent factors contribute to peripheral vasoconstriction in chronic congestive heart failure.